diff --git a/application/controllers/api/frontend/v1/calendar/RoomPlan.php b/application/controllers/api/frontend/v1/calendar/RoomPlan.php
index 522478f35..fd67e43d6 100644
--- a/application/controllers/api/frontend/v1/calendar/RoomPlan.php
+++ b/application/controllers/api/frontend/v1/calendar/RoomPlan.php
@@ -92,7 +92,7 @@ class RoomPlan extends FHCAPI_Controller
 		$result = $this->stundenplanlib->addReservation($start, $end, $title, $beschreibung, $ort_kurzbz, $lektoren, $studiengang_kz, $semester, $verband, $gruppe, $spezialgruppe);
 
 		if (isError($result))
-			$this->terminateWithError($result);
+			$this->terminateWithError(getError($result));
 
 		$this->terminateWithSuccess($result);
 	}
diff --git a/application/libraries/StundenplanLib.php b/application/libraries/StundenplanLib.php
index 4cfefc634..6c2f4fb79 100644
--- a/application/libraries/StundenplanLib.php
+++ b/application/libraries/StundenplanLib.php
@@ -528,6 +528,7 @@ class StundenplanLib
 		$this->_ci->load->model('ressource/stundenplandev_model', 'StundenplandevModel');
 		$this->_ci->load->model('ressource/stundenplan_model', 'StundenplanModel');
 		$this->_ci->load->library('PermissionLib');
+		$this->_ci->load->library('PhrasesLib', ['LvPlan']);
 
 		$startTime = new DateTime($start);
 		$endTime = new DateTime($end);
@@ -558,7 +559,7 @@ class StundenplanLib
 
 		if ((hasData($stundenplandev_belegung) || hasData($stundenplan_belegung))
 			&& !$this->_ci->permissionlib->isBerechtigt('lehre/reservierungAdvanced'))
-			return error ('lvplan/bereitsReserviert');
+			return error($this->_ci->phraseslib->t('LvPlan', 'bereitsReserviert'));
 
 		$this->_ci->ReservierungModel->addSelect('stunde');
 		$reservation_hours = $this->_ci->ReservierungModel->loadWhere(array('datum' => $startTime->format('Y-m-d'), 'ort_kurzbz' => $ort_kurzbz));
@@ -571,7 +572,7 @@ class StundenplanLib
 
 		if (!empty(array_intersect($stunden, $reservation_hours))
 			&& !$this->_ci->permissionlib->isBerechtigt('lehre/reservierungAdvanced'))
-			return error("lvplan/bereitsReserviert");
+			return error($this->_ci->phraseslib->t('LvPlan', 'bereitsReserviert'));
 
 
 		if (!empty($lektoren))
diff --git a/public/js/components/Cis/Renderer/Slot/roomModalContent.js b/public/js/components/Cis/Renderer/Slot/roomModalContent.js
index 87c457f4b..618b81c89 100644
--- a/public/js/components/Cis/Renderer/Slot/roomModalContent.js
+++ b/public/js/components/Cis/Renderer/Slot/roomModalContent.js
@@ -29,6 +29,7 @@ export default {
 			selectedGruppe: null,
 			selectedLektoren: [],
 			nestedGroupOptions: {},
+			selectedDate: null,
 		};
 	},
 	computed: {
@@ -84,6 +85,10 @@ export default {
 				?.setZone?.(this.timezone)
 				?.toFormat?.("HH:mm:ss");
 
+			this.selectedDate = newEvent.start
+				.startOf("day")
+				.toISO()
+				.slice(0, 10);
 			this.selectedStart =
 				this.timeGrid.find((t) => t.start === startTime)?.start ||
 				this.timeGrid[0]?.start;
@@ -92,16 +97,20 @@ export default {
 				this.timeGrid.at(-1)?.end;
 		},
 		saveEvent() {
+			const date = this.selectedDate
+				? luxon.DateTime.fromFormat(this.selectedDate, "yyyy-MM-dd")
+				: this.event.start.startOf("day");
 			const [startHour, startMinute] = this.selectedStart
 				.split(":")
 				.map(Number);
 			const [endHour, endMinute] = this.selectedEnd
 				.split(":")
 				.map(Number);
-			const selectedStart = this.event.start
-				.startOf("day")
-				.set({ hour: startHour, minute: startMinute });
-			const selectedEnd = this.event.start
+			const selectedStart = date.set({
+				hour: startHour,
+				minute: startMinute,
+			});
+			const selectedEnd = date
 				.startOf("day")
 				.set({ hour: endHour, minute: endMinute });
 
@@ -197,6 +206,18 @@ export default {
 					{{ slot.end }}
 				</option>
 			</form-input>
+			
+			<form-input
+				v-model="selectedDate"
+				:label="capitalize($p.t('ui', 'date'))"
+				type="datepicker"
+				container-class="col-6"
+				name="selectedDate"
+				format="dd.MM.yyyy"
+				preview-format="dd.MM.yyyy"
+				model-type="yyyy-MM-dd"
+				required
+			/>
 		</div>
 		<div class="row">
 			<form-input
diff --git a/system/phrasesupdate.php b/system/phrasesupdate.php
index 51400ac1d..2158c02fb 100644
--- a/system/phrasesupdate.php
+++ b/system/phrasesupdate.php
@@ -30563,6 +30563,26 @@ In the list:
 				)
 			)
 		),
+		array(
+			'app' => 'core',
+			'category' => 'LvPlan',
+			'phrase' => 'bereitsReserviert',
+			'insertvon' => 'system',
+			'phrases' => array(
+				array(
+					'sprache' => 'German',
+					'text' => 'Bereits reserviert!',
+					'description' => '',
+					'insertvon' => 'system'
+				),
+				array(
+					'sprache' => 'English',
+					'text' => 'Already reserved!',
+					'description' => '',
+					'insertvon' => 'system'
+				)
+			)
+		),
 		// LvPlan Phrasen ende
 		//ProfilUpdate Phrasen start
 		array(
@@ -55880,6 +55900,26 @@ and represent the current state of research on the topic. The prescribed citatio
 			)
 		)
 	),
+	array(
+		'app' => 'core',
+		'category' => 'ui',
+		'phrase' => 'date',
+		'insertvon' => 'system',
+		'phrases' => array(
+			array(
+				'sprache' => 'German',
+				'text' => 'Datum',
+				'description' => '',
+				'insertvon' => 'system'
+			),
+			array(
+				'sprache' => 'English',
+				'text' => 'Date',
+				'description' => '',
+				'insertvon' => 'system'
+			)
+		)
+	),
 	array(
 		'app' => 'core',
 		'category' => 'ui',